RiverFish

Gudgeon · Gobio gobio

Gudgeon in the River Derwent

Largest measured gudgeon: 18.5 cm

The largest gudgeon measured in Environment Agency surveys of the River Derwent was 18.5 cm, recorded at Borrowash on 26 September 2004.

Across 856 measured gudgeon, the median measured length was 10.9 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Derwent.

See gudgeon records across England →

Most recent observation22 September 2025Derby Triangle Net · 2 fish
Largest measured gudgeon
18.5 cm
Median length
10.9 cm
Fish measured
856
Survey locations
12

Individual EA measurements

Largest measured gudgeon

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
18.5 cm26 Sept 2004Borrowash82795
15.2 cm13 Oct 2002Borrowash64080
14.4 cm11 Sept 2005Church Wilne87969
14.4 cm11 Sept 2005Church Wilne87969
14.2 cm11 Sept 2005Church Wilne87969
14.1 cm12 Sept 2004Church Wilne82128
14 cm10 Sept 2006Duffield101396
13.9 cm10 Sept 2006Church Wilne101397
13.7 cm10 Sept 2006Church Wilne101397
13.7 cm13 Oct 2002Borrowash64080

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where gudgeon were found

Each point marks a survey location with at least one gudgeon record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding gudgeon
Derby Triangle Net22 Sept 202522 Sept 20251
Darley Abbey Net17 Sept 202517 Sept 20251
Nooning Lane Net29 Sept 201019 Sept 20242
Nooning Lane19 Apr 200524 Aug 20176
Borrowash Fish Pass Pool116 Sept 201616 Sept 20161
Borrowash Black Weir25 Sept 201525 Sept 20151
Chub Alley3 Aug 201217 Sept 20142
Chub Alley Net29 Sept 20103 Aug 20122
Borrowash14 Oct 20016 Sept 20096
Church Wilne28 Apr 19935 Oct 20087
Duffield10 Sept 200610 Sept 20061
Alvaston22 Apr 199317 Feb 19982

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1993–2025

Survey records by year

Each bar shows how many survey visits recorded gudgeon that year.

Fish measured by surveyors

Measured length distribution

See how the 856 measured fish were spread across different length ranges.

Smallest
2.3 cm
Lower quarter
9.8 cm
Median
10.9 cm
Upper quarter
11.9 cm
Largest
18.5 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Derwent

Compare other species with enough survey and measurement data for a detailed page.

Brown / sea trout Bullhead Minnow Grayling Chub Stone loach

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →